Method of lining can ends and mechanism therefor



Au M, 1922 1,4651% W. J. TOWLE METHOD OF LINING CAN ENDS AND MECHANISM THEREFOR Fild Avril -10 .1922 3 Sheets-Shae?I 1 27 2k /8 /9 /7 lg 86 [N VEN TOR MLL/HM J lbw L5 Aug. 114, 1923. mfism W. J. TOWLE METHOD OF LINING CAN ENDS AND MECHANISM THEREFOR Filed April 10. 1922 3 Sheets-Sheet 2 4.

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W. J. TOWLE METHOD OF LINING CAN ENDS AND MECHANISM THEREFOR Filed April 10. 1922 5 Sheets-Sheet 5 Z/VYEA/TOR MLLMIMJ: 722M415 /7 li wz nlhwit Patented Aug. 14, 1923.

WILLIAM J. TOWLE, OF ST. PAUL, MINNESOTA.

ivrnrnonor mums can nuns AND MECHANISM 'rrrnnnron.

Application filed April 10, 1922. fierialN'o. 551,345.

To alien/tom it may concern:

Be it known that I, WVILLIAM J. TOWLE,

'.citizen of'the United States, resident of St.

Paul, in the county of Ramsey and Stateof i /linnesctzu'have invented' certain new and useful improvements in Methods OfLlIllIlg Can Ends and Mechanism Therefor, of

which the following is a specification.

This'i nvention consists in a novel method of lining can ends, and in improved means or mechanism therefor.

I The principal object of the invention is to provide a method of forming a gasket liner 'WhlQlIl the can end is utilizedas a, die element inputting both the inner and outer edges of the gasket; applying the gasket,

thus formed, to the fianged part of the'can end, and upturning the outer edge of the flange of the can end to secure, retain and Another object of theinvention is to provide a method of formingthe gasket liner 'inwhich the wall of'a shoulder or panel,

formed in the can end, is utilizedas "a die member for cutting the inner edge of the gasket, utilizing the edge ofthe flange,

as itisupturned, as a die member, to cut the outer edgeof; the gasket.

Another object of the-invention is to provide a method by whichthe gasket is firmly seated and snugly held in a groove in the can end formed between the shoulder or Wall of the panel and theupturned edge of the fiange. Y

The' invention consists generally in the method or process, and in the constructions and combinations hereinafter described and particularly pointed out in the claims.

In the accompanying drawings Figure I is a partial'sectionalview of a machine adapted to be used in carrying out my process and also showing-the means for feeding the strip of gasket material into the machine. i 3 y Figuire 2 is an enlargedwertical section on line 2-2 of Figure 3, showing the strip of gasket material, in position between the die punch and the can end.

Figure 3 is a partial sectional View on-the line 33 of Figure 2, looking in the direction of the arrow. "f

Figure er -is a detail'view showing the die punch lowered to a position-to allow the rubber pad-on the'knock out'platejto firmly hold the paperstrip against" the canend besecured to the bed yided in the forming fore the commencementof the cutting opermachine, havinga bed plate 3, and the usual plunger or ram 4 to which the die punch, hereinafter described, is secured. The means for operating the plunger l'may be of c any well-known type and construction (not shown).

The strip of gasket material 5, preferably paper, is fed by suitable feed rolls 6 and 7, mounted preferably on the bed plate 8. A guide plate 8, preferably formed of spring steel, so as to be capable of yielding, is secured to the bed plate, adjacent to the feed rolls 6 and7, to guide the gasket strip over a forming die 9, and centering block 10, plate by screws 11 and draw ring 13 is prodie 9, and is yieldingly held in its upper or normal position by pins 14, preferably four in number, bearing against a plate 15, which co-acts with a rubber cushion'lti, washer 17, and nut 18,'on the stud bolt 19, secured to the bed plate 3. A. flange 20 is provided on the draw ring 13, to engage the upper part of the recess 21 in the forming die, to limit the upward movement of said ring. The centering block 10 may be stationary or a movable member properlysupported, or again may be made a part ofthe draw-ring 13, and is preferably arranged to project slightly above the face of. the forming die 9, as shown in FigureQ, and is ofsubstantially the same form as the inside of the raised or paneled portion of the can end 22, thereby serving as a centering meansfor the can end, and prea venting lateral movement of said can ends 12 respectively. A

during the operation of cutting and applyis secured by suitable means to the taeeof side of said punch, with their lower edges extending downward n'actically on a level it) i the knock-out plate hi, and projects normally slightly below the cutting edge otthe punch, being held in its lowermost position by springs 26, hearing against the heads of thescrews 25. pair of gripper:- bars 29 are shown and may be employed, one on. each iviththecutting edge of the punch 23. Tension bars 30 are also shown yieldingly secured to the bed plate by means ot'bolts and springs 31. These tension bars are shown arranged beneath the gripper bars 29.

For feeding the can ends into the machine and bringing them into proper position over the centering bloc r 10, Ipreterably provide a chute 36 arranged on the bed plate 8. :I-have here showna feeding mechanism consisting ot reciprocating slide 37 arranged to more in a groove in a support 38 and operated by an oscillating arm 39. A; pusher blade 40 is piv'otally mounted, at 41, on the slide 37, and when the slide'inoves back tohengage a new can end, the Pusher blade yields slightly upward and passes-over the can end nearest the formingdie, until theishoiilder 42cm the pusher blade engages the raised portion of-said can end, and on the forward stroke moves it beneath the punch, centering it upon the block 10;

I prefer to provide upon the pusher blade 40 a finger 43 preferably made of spring steel that bears upon the t p. Ofthe can end as the same is being moved forward by the pusher blade, to securely locate the can end on the blocklO, j i o 5 Ialso prefer to provide an inclined guide plate- .45, preferably secured. by screws 46 in a recess 46 inthe uppersurtace of the torniing die 9, in line with the chute through which thecan ends are ted into the machine,

itsfunctiongbcing to sufficiently elevate the forward flange or the can end so that said flange will clear the raised portion of the centering block l0 when the can end is forced over said block. I have shown, and may use transverse rods 34, supported in lugs 35 mounted on the bed plate 3 in 1705i? tion so that the strip 5, from which the gaskets are formed, passes below saidrods. The upward movementof the strip'with the die'is limited by said rods. I -V In Figure 8 I have shown a modified con striictionin which a die block 3? is, secured tothebed plate 3supportedupon thebase 2 said ldie block beingpr'ovided witha series of holes 10 permitting the uSe of various sizes of centering blocksill), draw-r ngs 13 and forming dies 9. l Vith ,this construction the pins 14: are shown resting upon the blocks leicarriedby the plate 15.

In this view I have also illustrated a bellcranklever 33, carriedbythe plunger and of usual construction, raopei-ate the knockout plate 241,- The lever is shown provided 51 securedto said plate by-suitablc screws 7 52. The gasket strip.,j5- passes between the plate 1, 8 and the under surface :Off the giiide bar 51, A bar 29 securedto the plunger t is in position ,to enga'g'e the guide bar 511 as the plunger descends, thereby permitting the a sketstrip to bemovedvdownward into contact with-thecanend;

Operation. V The can ends are fed into the machine by any suitable means. Iibr ter-the mfichanisrn herein shown bywhichfl theyfare pushed through the chute and over the {centering block 10,-whiich,bringsthern injJroperalignment in respect to the -punch. 'Tl' estrip ot gasket material is fed: across'the can end'that has been positioned in;the-,.machine and the downward movement of the punch brings the face of the rubber pad-or block 2S into engagement withgthe-ipaper strip andfmoves the same downward into ,contact with the nr r 05616 .311 ead- .Aj t eni ement ,of the punch causes the knocleeut plate and rubber pad 28, which have been stopped by contactwith theupper; face, of; thef'can ends, to ,be pressed firmly aga nst'thegface of the n. r der-ten wa"attir p ne 26 which are: compressed in; the sockets in which they are, placed, the headspt thescrews which are new in. a stationary position, acting with .the ends otthe sockets to ins compress said springs as the punch continues 7 its downward movement 1v 1 i I The die 23 fits the vertical wall or shoulder forming thei panel :in-the can end; and the center v ot the gasket is tcutcut-asthe inner edge 28? of the die comes in contact with this verticalwall o f thjepan GHClfi; i 1

A furthei movement"of-the die carries the paper strip against; the upper. .fsufrface of the flange 22 of the can .end, and-pressure of the taco ot-the diegupon thi flange forces the ,ring 13 downwarda-ithe rubber cushion 1,6 yielding-for-this purpose. he 7 face of the die is slightly narrower than the opening in die 9 so that further downward movement of the die 23 causes the of the forming die 9.

. as well as the shape'of the centering block edge of the flange 22 of thecan end to be turned sharply upward between the outer face of the die 28 and the inner face or wall ure 4 to that shown in Figure 6 the gasket material will be forced against the outer edge 23 of the die '23 as the edge of the flange 22 is turned up which cuts the outer line of the gasket. "This action cuts the gasket and forms the recess simultaneously and seats said gasket firmly in said recess, so that there Wlll be no danger of sald gasket becoming loosened and dropping out of said recess during the subsequent handling of said can ends. 7

As the gasket is cut out'by the co-action of the punch die and the can end, the process of seating the gasket in the groove in the can end takes place simultaneously with the turning up of theedge of the flange 'to form the wall of said groove. As the inner edge of the gasketis out by the shoulder or panel wall, and'the outer edge by the upturning of the flange of the can end, it follows that the gasket fits snugly within the groove or space that-is formed between the shoulder or wall of the panel and the upturned edge'of the flange. The gasket will remain in position in thisgroove without the use of glue or other adhesive mate-:

rial. The'can ends may, therefore, be freely handled withoutnny danger of the gaskets dropping out of the grooves. Q

Thecan ends may be circular, oval,'rectangular, or of any other desired shape. The

gaskets will usually be formed ofpaper, though any other suitable material may be employed. While I have referred to the element or part13 as a. draw-ring it will be understood that the shape of this element,

10, the forming die 9 and the punch die 23 will correspond to the shape or outline of the can end.

Upon, the reverse or upward movement of the plunger 4: the can end will travel up ward with the die until pushed off by the knock-out plate; The machine will ordinarily be arranged in an inclined position so that as the can ends with the inserted "slide into a suitable chute the drawtion.

I claim as my invention:

1. The method of forming and applying gasketliners tojmetal can ends having a shouldered or panel center and a laterally projecting flange, which consists in bringing the strip of gasket material over the canend, pressing saidstrip against the can end and cutting the inner edge of the gasket by contact of the gasket strip with the panel wall or shoulder, and cutting the outer edge of the gasket by contact of the gasket strip with the outer edge of the laterally projecting flange at the time this outer edge" is being turned up, and seating said gasket in the groove in the can end 'thus formed between said upturned edge and said shoulder, all at one operation.

2. The method of forming and applying gasket liners to metal can ends having a shouldered or panel center, which consists in pressing the strip of gasket material against the can end, and cutting the inner edge of the gasket by contact of the gasket strip with the panel wall or shoulder, and cutting the outer edge of the gasket by contact of the gasket strip with the outer ed e of the laterally projecting flange at tie time this outer edge is being turned up, and seating said gasket in the groove or recess in the can end formed between said upturned edge and said shoulder, all at one operatlon,

3. The method of forming and applying gasket liners to metal can ends having a shouldered or panel center and a laterally projecting flange, which'consists in pressing the strip of gasket material against the vcan end, thereby cutting the inner edge of the gasket from the gasket strip by using the panel wall or shoulder as a die member, and seating the same on said flange around said shoulder all at a'single opera 4:. The method of forming and applying gasket liners to metal can ends having a laterally projecting flange, which consists in turning upthe edge of the flange and pressing the strip of gasket material against said edge as the same is being turned up, and thereby cutting the outer edge of the gasket, and seating said gasket on said flange within said upturned edge, all at a single operation.

5. The method of forming and applying gasket liners to metal can ends having a laterally projecting flange, which consists in pressing the strip of gasket material against aid flange, turning up the outer edge of the flange, thereby cutting the outer edge of the gasket as the outer edge of the flange is being turned up, and seating said gasket on said flange, within said upturned edge, all at a single operation.

6. The method of forming and applying g asketby' contact of the gasket liners to metal can ends hating a shouldered or 1l aneledcenter and a laterally project ng :fiange' j wlnch' consistsiin pressing strip otgaslget mater a'l' against the can end, "thereby cutting" the inner edge of the A gasket Qstrip with the panel Wall" or shoulder, turningfup; the outer edgeoi theflange, thereby cutting the outelfeclge of the gasket [as the oi lter edge of the flange is being turned up, and seating; said gasket. on said flange iitit hin said upturned edge and around said shoulder, all at one operation.

"'7. The method of forming and applying gasket liners to metal can ends having 'a shoulderedior'panel center and a projecting flange, which consists in pressg'tl'le'strip otigasket material against the can lend, thereby cutting the inneredge of the gasket by contact of the gasket strip iviththe p anel Wall or shoulder, seating the same around said shouldeniurning up the SfL Iean'sdor forming and applying gasket liners to'can ends having a raised, or.

i'aa'nelled center and a laterally projecting flange, comprising, in combination, 'ineans for centering and holding a can end, a forming die upon which the outer portion of saidfflang'e rests, a draw-ring With n said die, means for feeding a, strip of t nat'erial across said centering means ant said die andfdra -ring, andfa punch arranged in 'alignrnent with said centering means, and cogopemung with the can end shoulder to out the inner edge of thegasket and press said gasketuponthe flangeof thecan end.

9. Means for forming and applying ket liners to can ends having a laterally projecti ng: flange, comprising, in combination, Ineans for centering and holding a can end, efraining die upon which the outer portion of saidflang e rests, a. draw-ringwitlp in said die, means for feeding. a strip of gasket material acroSs aid centering neans, aria said forming die and drgu -ring, and a punch arranged in alignment with said centering ineans, andco-operating with the forming die to turn up the outer edge of the flange and simultaneously cut the outer edge or the gasket. 7

Means for forinin'g and applying gasket liners to can ends hayinga latera p rj is t g flang b i i nsy in omb n tion, means for centering and holding a can end, a forming die upon Which-the outer portion of saidfiange rests, ne/ans for feeding a strip or gasket material across said centeril ig means and forming die, a punch arranged in aligninent with said centering means, and ,co-operating with the forming die to turn up the outer edge oft he flange and simultaneously out the outer edge of the gasket. r g i r 11. The combination, with a. centering block arranged to hold a can end having a raised or panelled center, of means-tor fe d ing a strip of gasket material across s, centering lock, and a punch having a arranged to co-operate with a "can end held upon said centering block to cut the inner edge of a gasket liner between the edge of die carried by the punch fand the Wall 7 of a can end acting as a'd'ie inenibeir and supported upon said centering block.

12. The combination, with a centering bloclr arranged to hold a can end having a raised or panelled: center, ofnieans for feed-V ing a sheet of gasket material across said centering block, a punchhaving a die arranged to. co-operate with a can end held upon said centering hlockfto cut the inner edge of a gas :et liner between the edge of the die and the all ofa can, end acting as a; die ineniber supportedupon the centering block. 7

' 1 8, The combination withineans arranged tocenter and hold a can. end, haitinga laterally projecting flange, of a f or ning. die arranged to, support. the outer edge otlfsaid li YILL IAM, .1 VTOWLE. 

